981730 has 16 divisors (see below), whose sum is σ = 1860480. Its totient is φ = 371952.

The previous prime is 981713. The next prime is 981731. The reversal of 981730 is 37189.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (981731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2394 + ... + 2773.

It is an arithmetic number, because the mean of its divisors is an integer number (116280).

2⁹⁸¹⁷³⁰ is an apocalyptic number.

981730 is a deficient number, since it is larger than the sum of its proper divisors (878750).

981730 is a wasteful number, since it uses less digits than its factorization.

981730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5193.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 981730 is about 990.8228903290. The cubic root of 981730 is about 99.3872530808.

It can be divided in two parts, 981 and 730, that added together give a triangular number (1711 = T₅₈).

The spelling of 981730 in words is "nine hundred eighty-one thousand, seven hundred thirty".